Calculate Cronbach's alpha α = (k/(k−1)) × (1 – ∑σᵢ² / σᵀ²) from item variances and total score variance. Measures internal consistency of a multi-item scale. Accepted threshold α ≥ 0.70 for research; ≥ 0.90 for clinical use.
Calculate Cronbach's alpha α = (k/(k−1)) × (1 – ∑σᵢ² / σᵀ²) from item variances and total score variance. Measures internal consistency of a multi-item scale. Accepted threshold α ≥ 0.70 for research; ≥ 0.90 for clinical use
Each component has a specific meaning:
Note: Interpret the cronbach's α result against the thresholds and context described above.
Enter the item variances for the scenario you are assessing. Calculate Cronbach's alpha α = (k/(k−1)) × (1 – ∑σᵢ² / σᵀ²) from item variances and total score variance. Measures internal consistency of a multi-item scale. Accepted threshold α ≥ 0.70 for research; ≥ 0.90 for clinical use. Use the cronbach's α result to inform your calculation.